Hydrogen peroxide works well on old, ground-in stains of almost every kind, and it's easy to use. Add cream of tartar or non-gel toothpaste to a teaspoon of 3 percent hydrogen peroxide. Dab the paste on the stain with a gentle cloth until it disappears.
Vinegar can be used to deodorize a space and to loosen and remove food stains from carpet fibers. Combine equal volumes of white vinegar and water and spray it on the stain to clean and deodorize it.
Wool, silk, and other natural-fiber carpets are especially susceptible to damage when subjected to concentrated acids. Vinegar is not recommended for use on wool or synthetic carpets since it can degrade the fibers irreparably.
Carpet that has been ruined could be a tripping danger. Many things, including broken carpeting or exposed cables, can cause tripping hazards. These are sometimes classified as physical dangers.